In 1958, Faget became one of the 35 engineers who formed the Space Task Group, creating the Mercury spacecraft. Faget based his designs on the aerodynamic work of Harvey Allen from the mid-1950s, and was instrumental in selecting the blunt-body shape that won the Mercury competition over numerous contenders. Faget also led the development of the escape tower system used on Mercury, which was used in various forms on almost all following manned spacecraft. Faget also worked on the Gemini and Apollo vehicles, which shared many design points with the Mercury.[5]

Faget filed a patent for a space shuttle vehicle design in 1972. His design, which he named "DC-3" in homage to the famed Douglas DC-3 airliner, was a small two-stage fully reusable shuttle with a payload capacity around 15,000 pounds (6,800 kg). DC-3 was officially studied by North American Aviation and shown in the press as a baseline contender for the Space Transportation System (STS). North American also studied a version of the same basic system with a much larger 50,000 pounds (23,000 kg) payload. However, the DC-3's nose-high re-entry profile was controversial, and eventually doomed it when the U.S. Air Force joined the Shuttle program and demanded cross-range performance that the DC-3 simply couldn't meet. In the end, its most lasting contribution was to clearly identify the trade-offs inherent in any reusable design.[6]

In 1962 he became the Director of Engineering and Development at the Manned Spacecraft Center[3] and continued to work for NASA until his retirement in 1981, shortly after the second Space Shuttle flight (STS-2). After his retirement, Faget was among the founders of Space Industries Inc., established in 1982. One of the projects of the company was the Wake Shield Facility, a device to create near-perfect vacuum in space. The WSF flew three times with a Space Shuttle in 1994–96 (STS-60, STS-69, STS-80).

Max Faget was a co-inventor on five United States patents issued to Space Industries, Inc. between 1988 and 1992. The patents, which are listed below, can be found at the USPTO's public web site. PAT. NO. Title